code: def test_new_ray_session(stop_ray, backend):
      new_ray_session_test(backend)
  
file_path: mars/mars/deploy/oscar/tests/test_ray_cluster_standalone.py
imports: import pytest
  import mars
  from ....None import tensor
  from ....None import dataframe
  from ....tests.core import require_ray, mock
  from ....utils import lazy_import
  from ..ray import new_cluster_in_ray, new_ray_session, _load_config, new_cluster
label_desc: Use image node_id 2 for calling a global function with example usage: test_new_ray_session(stop_ray, backend) without return types